Boiler bearing



W. W. LEMEN ET AL BOILER BEARING F1166 M r h 17 109624 2 Shasta-Sheet 2 8 0 o o o o o o o o o g Q 9000000 000 5 00000000000000 0 8 0 0 0 O O O 8 O O O O 8 G o o o o o o o o o' o o o 0 0 080 0 o 00000 00 0 0 0 0 0 O O O O 0 0 c) 0 0 0 0 0 0 0 0 o o o o o o o o o o o o o o o o o o o o 0 WITNESSES Mfg flM I Patented Oct. 21, 1924.

UNITED STATES 1,512,473 PATENT OFFICE.

WILLIAM W. LEMEN, OF LOS ANGELES, CALIFORNIA, AND DANIEL G. CUNNINGHAM, OF SALT LAKE CITY, UTAH.

\ BOILER BEARING.

Application filed March 17, 1924.

To all whom it may concern:

Be it known that we, WILLIAM LEMEN,

a citizen of the United States, residing at.

Los Angeles, in the county of Los Angeles and State of California, and DANIEL Gr.

CUNNINGHAM, a citizen of the United States,

residing at Salt Lake City, in the county of Salt Lake and State of Utah, have jointly invented a certain new and useful Improvement in Boiler Bearings, of which improvement the following is a specification.

Our invention relates, particularly, to the boilers of locomotives of the Mallet type, and its object is to provide a bearing for the front end of such boilers which will overcome the difficulty, heretofore encountered, of maintaining steam tight joints with the ordinary bolted construction.

The Mallet type of locomotive has proven itself of advantage for use on railroads where many short radius curves exist, since, owing to its articulated wheel arrangement, it is enabled to negotiate such curves more easily then ordinary locomotives. The boiler 5 is rigidly attached to the rear engine frame structure, and a pivot, at the front end of the rear engine frame, enables the front engine frame to swivel, in the manner of a leading truck, when passing through curves. But, inasmuch as part of the weight of the boiler is carried by the front engine frame, it becomes necessary to provide boiler bearings on which the front part of the boiler can slide, in order that bearing contact may be maintained, when the front engine frame swivels in passing over a curve. These bearings consist of a frame cross-tie having an extended flat top forming a bearing surface for a saddle, secured, according to the pres ent practice, to the under side of the boiler, by bolts passing through the shell. The bolting of the saddles to the boiler shell, must be done before the flues are inserted, and, should a steam leak appear, requiring the replacement of one of the bolts to cure it, removal of the lines is necessary before the bolt can be reached, which is a lengthy and costly operation, resulting in the locomotive being kept out of service for a long 50 period of time.

In our present invention, the bolted joint of prior practice is not applied, and, in its stead, the connection is eflected by means of straps, which pass around the outside of the boiler, and are'provided with means for Serial No. 699,802.

tightening them so as to secure the saddles firmly in position.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a diagrammatical side view, in elevation, of a locomotive of the Mallet type, illustrating an application of our invention; Fig. 2, a plan View of the same; Fig. 3, a. transverse section, 011 an enlarged scale, through the boiler showing one of the bearings; and, Fig. 4, a detail view of one end of the strap.

In the practice of our invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the boiler, 1, of the Mallet type of locomotive shown in Fig. 1, is rigidly attached, as usual, to the rear engine frame, 2, which is pivot-- ally connected, by a pin, 3, to the front engine frame, 6. The bearings, indicated as a Whole by the symbols, 5, 5, which transmit the weight of the front part of the boiler to the front engine frame, are of the following construction. Referring to Fig. 3, the side members of the front engine frame are connected, by a cross-tie, 7 having a flat top, 7, on which is placed a spacer, 8, which fills the space between the top, 7, of the frame cross-tie and the bottom face, 9, of the boiler saddle, 9, which is a casting having an upper flange, 9", curved con'espondingly with the contour of the boiler shell. The extremities of the flange, 9 are provided with lugs, 9, spaced sufficiently far apart to permit the introduction between them of lugs, 10 formed on the lower ends of straps, 10, which pass up around the boiler shell. The upper ends of these straps are turned into flanges, 10 and a bolt, 11, is passed through said flanges, to draw the straps up tight on the boiler shell, by a nut, 11, on the bolt. Bolts, 12, are passed through the lugs, 10*, on the lower ends of the straps, and through the lugs, 9, of the boiler saddle, 9, said bolts being provided With nuts, 12, as shown in Fig. 41-.

The boiler saddles are prevented from moving longitudinally by tie rods, 13, passing through lugs, 9 on the saddles, below the lugs, 9, and the front saddle is connected to the smoke box, 1 of the boiler, by tie rods, 14, attached to angles, 15, on the sides of the smoke box. WVhile bolts are required for securing the angles to the boiler,

they do not pass through the shell or Waist containing Water and steam, and consequently cannot cause steam leaks.

It will be seen that the means above de scribed provide a secure connection of the boiler to the forward engine, with proper provision for relative movement, and that no bolt holes are required in the boiler shell proper, so that no objectionable result, due to steam leaks through the bolt holes, as in prior practice, Will be encountered.

We claim as our invention and desire to secure by Letters Patent:

1. In a locomotive of the Mallet type, bearings for the front part of the boiler, comprising a saddle, curved to the contour of the boiler shell; a pair of straps, hinged to the ends of said saddle and passing up around the shell; and means for tightening said straps on the shell.

2. A front bearing for boilers of Mallet locomotives, comprising a frame cross tie; a saddle fitting the lower part of the boiler and slidably supported by said cross tie;

and straps, passing around the boiler, for securing said saddle thereto.

A front bearing for boilers of Mallet locomotives, comprising a. frame cross tie; a saddle fitting the lower part of the boiler; a spacer block, interposed between the cross tie and the saddle, and on which the latter slides; the extremities of said saddle having apertured lu s; a strap hingedly connected to each of said lugs, fitting around the boiler, and terminating at the top in an apertured flange; and a bolt passed through the said apertured flanges of the straps to tighten the latter on the boiler.

l. In a locomotive of the Mallet type, the combination of two boiler bearings; tie rods, passing through lugs on said bearings; and the rods, connecting the forward bearing with the smoke box of the boiler.

VILLIAM V. LEMEN. DANIEL Gr. CUNNINGHAM. Vitnesses as to Cunningham:

A. F. TI-IAYER, MARIE HILL. 

